compiler-rt/test/tsan/Darwin/signals-blocked.cpp

   1 // RUN: %clangxx_tsan %s -o %t && %run %t 2>&1 | FileCheck %s
   2
   3 #include <pthread.h>
   4 #include <stdio.h>
   5 #include <stdlib.h>
   6 #include <signal.h>
   7 #include <sys/types.h>
   8 #include <sys/time.h>
   9 #include <unistd.h>
  10 #include <errno.h>
  11
  12 volatile bool signal_delivered;
  13
  14 static void handler(int sig) {
  15   if (sig == SIGALRM)
  16     signal_delivered = true;
  17 }
  18
  19 static void* thr(void *p) {
  20   sigset_t sigset;
  21   sigemptyset(&sigset);
  22   sigaddset(&sigset, SIGALRM);
  23   int ret = pthread_sigmask(SIG_UNBLOCK, &sigset, NULL);
  24   if (ret) abort();
  25
  26   struct sigaction act = {};
  27   act.sa_handler = &handler;
  28   if (sigaction(SIGALRM, &act, 0)) {
  29     perror("sigaction");
  30     exit(1);
  31   }
  32
  33   itimerval t;
  34   t.it_value.tv_sec = 0;
  35   t.it_value.tv_usec = 10000;
  36   t.it_interval = t.it_value;
  37   if (setitimer(ITIMER_REAL, &t, 0)) {
  38     perror("setitimer");
  39     exit(1);
  40   }
  41
  42   while (!signal_delivered) {
  43     usleep(1000);
  44   }
  45
  46   t.it_value.tv_usec = 0;
  47   if (setitimer(ITIMER_REAL, &t, 0)) {
  48     perror("setitimer");
  49     exit(1);
  50   }
  51
  52   fprintf(stderr, "SIGNAL DELIVERED\n");
  53
  54   return 0;
  55 }
  56
  57 int main() {
  58   sigset_t sigset;
  59   sigemptyset(&sigset);
  60   sigaddset(&sigset, SIGALRM);
  61   int ret = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
  62   if (ret) abort();
  63
  64   pthread_t th;
  65   pthread_create(&th, 0, thr, 0);
  66   pthread_join(th, 0);
  67
  68   fprintf(stderr, "DONE\n");
  69   return 0;
  70 }
  71
  72 // CHECK-NOT: WARNING: ThreadSanitizer:
  73 // CHECK: SIGNAL DELIVERED
  74 // CHECK: DONE
  75 // CHECK-NOT: WARNING: ThreadSanitizer: